CN1579038A - high-speed transmission connector - Google Patents

Abstract

A high-speed transfer connector comprising: a substrate-side connector and a cable-side connector to be connected to each other, a metal shell covering the housing, and terminals provided in the housing. The metal shell of the cable side connector is inserted into the metal shell of the substrate side connector, so that the terminals and the metal shells are electrically connected, respectively. The metal shell of the substrate-side connector includes a groove portion for adjusting a spacing between the metal shell and the terminal in the substrate-side connector. With the present invention, the characteristic impedance can be adjusted in an easy manner, the connector can be sufficiently miniaturized, and higher density can be achieved.

Description

high-speed transmission connector

technical field

The present invention relates to a high-speed transmission connector in which a metal shell cover of a housing provided with a plurality of terminals has an impedance matching function.

Background technique

High-speed transmission connectors, especially connectors or cables provided on differential signal transmission paths, require characteristic impedance matching in addition to easy and convenient connection between existing devices.

For example, in communication connectors in audio/video equipment, the number of connectors to be connected is reduced, and the connector itself is required to be miniaturized. In addition, when new requirements are placed on the connector to meet new high-speed digital transmission, there will be The following questions. These problems are that when there is an impedance mismatch in the connector portion, the image signal or sound signal is distorted or reflected, so that the image or sound cannot be reproduced normally. Therefore, in such a connector to be installed in a high-frequency signal transmission path, impedance matching performance is an important requirement.

Japanese Patent Laid-Open No. Heisei-7-106027 discloses a technique related to the characteristic impedance of a connector. In this technology, a high-frequency signal transmission path is constituted by terminals having a non-coaxial structure, and a control signal transmission path is constituted by the same terminal member, thereby achieving low cost and miniaturization.

In the current signal transmission connector, the terminal is covered with a metal shell outside the housing. The reason is that covering the casing with a metal casing can effectively prevent noise or loss caused by electromagnetic wave radiation.

When this type of connector is a pair of connectors (composed of a male connector and a female connector) that are mated with each other, a metal shell is provided as an electromagnetic shield for each connector. When connecting, usually, the metal shell on one connector fits into the metal shell on the other connector, and the metal shells of the two connectors are electrically connected to each other, thereby putting it in a mode so that these The potential remains the same and ground is achieved.

The metal housings of the above two connectors are formed in a sleeve shape having engaging portions butted against each other. Therefore, since the metal housing of one connector fits into the metal housing of the other connector, the metal housing and the connector placed therein must be very close to each other. As a result, an impedance mismatch problem occurs at the meshing portion.

According to this technical solution, some conventional connectors adopt a method of adjusting the characteristic impedance according to the pitch of the terminals, the width of the terminals, or according to the inductance of the insulator (housing) that fixes the terminals.

However, there are many defects in the design and manufacture of the connector by this method. Among them, in order to adjust the characteristic impedance, the connector itself or its pitch must be enlarged, which will inevitably sacrifice its miniaturization and high density. . In addition, the plate material used to make the terminal must be a material with a certain thickness, which is usually not easily available in the market.

Contents of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-speed transmission connector which can easily adjust the characteristic impedance, which can sufficiently miniaturize the connector, and have higher density.

According to the high-speed transmission connector of the present invention, it includes: a pair of connectors that are butted with each other, (that is, a male connector and a female connector); wherein, each connector is provided with a metal shell covering the housing, and multiple connectors are arranged in the housing. The metal shell of one connector is installed into the metal shell of the other connector, so that the metal shells and terminals of each connector are electrically connected respectively, and a groove part is set in the metal shell of one connector for Adjusts the distance between the terminal and the metal housing of the other connector.

According to the present invention, since the groove portion for adjusting the distance between the terminal and the metal case is provided in a connector, it is possible to perform impedance matching by the action of the groove. That is, the groove portion can be easily formed by punching the metal case without providing a separate member. In addition, it is easy to adjust the depth of the groove portion. Therefore, it is easy to adjust the impedance with the groove portion. The reason for this is that the change in impedance of the connector is strongly related to the distance between the metal shell and the terminal.

Preferably, the spacing between the terminals in one connector and the groove portion is set substantially equal to the spacing between the terminals and the groove portion in the other connector. Therefore, with this structure, since the total length of the distance between the terminal and the groove portion in one connector is substantially equal to the terminal and groove portion in the other connector after one connector is engaged with the other connector The total length of the space between, so, impedance matching becomes easy.

Here, the grooves of the metal shell can be provided in multiples. As for the groove, a single large groove may be provided. However, for example, when forming the groove portion with a punch, it is easier to form a plurality of grooves with a punch, and it is easy to secure the mechanical strength of the metal case. Also, in the case of a plurality of terminals, the plurality of grooves can correspond to the plurality of terminals with high precision.

A plurality of terminals are provided in each connector at a certain interval in the width direction of the connector. High density can be achieved by arranging a plurality of terminals in the width direction of the connector, and furthermore, it is easy to make each terminal correspond to each groove portion.

A plurality of groove portions are provided at regular intervals in the width direction of the connector. With this configuration, a plurality of rectangular or elliptical groove portions can be formed at high density without difficulty.

Also, each groove portion is preferably provided in a flat portion of the metal housing of a connector into which an engaging portion of the other connector is inserted adjacently. With this structure, due to the presence of the groove portion, it is possible to avoid a negative influence on the area of the mating portion of the connector. That is, the bottom of the groove portion protrudes inwardly from the inner surface of the metal shell, however, the groove portion is deviated from the area of the mating portion of the connector. Therefore, it is possible to obtain a small and thin connector structure that facilitates higher density.

The groove portion is preferably provided on the metal case near the terminal for transmitting the differential signal, particularly above or below the terminal. With this structure, each differential signal can be correctly transmitted without impairing the signal quality.

At this time, the portion corresponding to the bottom of the groove protruding inward can constitute a stop portion, to which the metal shell of the other connector is inserted, thereby precisely defining the engagement position of the two connectors.

Moreover, a locking device can be provided on the metal shell of one or two connectors, so that the two connectors can be locked with each other. The locking device ensures the electrical connection effect between the metal shells and the display locking function.

Description of drawings

1 is a sectional view of the main part of a connector on one side of a substrate and a connector on one side of a cable according to a first embodiment of the present invention, wherein upper terminals and lower terminals are symmetrically displayed on the same sectional view;

2 is a perspective view of a connector on one side of a substrate according to a first embodiment of the present invention;

Fig. 3 is a cross-sectional view of the connector on one side of the substrate according to the first embodiment of the present invention, only showing the upper terminal;

Fig. 4 is the front view of the connector on one side of the substrate according to the first embodiment of the present invention;

5 is a top view of the connector on one side of the substrate according to the first embodiment of the present invention;

Fig. 6 is a side view of the connector on one side of the substrate according to the first embodiment of the present invention;

7 is a front view of a connector on one side of a substrate according to a second embodiment of the present invention; and

Fig. 8 is a partial sectional view of a connector on one side of a cable according to each embodiment of the present invention.

Detailed ways

A high-speed transmission connector for a portable communication device according to an embodiment of the present invention will be described below. For convenience of explanation, Fig. 1 is a sectional view of the main part of a connector according to a first embodiment of the present invention. 2 is a perspective view of a connector mounted on a printed circuit board (hereinafter simply referred to as "board-side connector") according to a first embodiment of the present invention. Fig. 3 is a sectional view of the connector.

That is to say, in the general diagram, the connection shown in FIG. 1 is to connect the connector for the differential transmission cable shown in FIG. Connectors mounted on the board shown. Details will be given below.

The high-speed transmission connector of this embodiment includes: a substrate-side connector 10 and a cable-side connector 20 connected to each other. Both the substrate-side connector 10 and the cable-side connector 20 comprise terminals 12 , 22 arranged in housings 11 , 21 and metal shells 13 , 23 covering housings 11 , 21 .

As shown in Figure 1, the connector 10 installed on the substrate includes: a housing 11 made of insulating resin, a plurality of terminals 12 provided in the housing 11 by press fitting or insert molding, and a metal shell 13 , covering the outside of the casing 11 , but not covering the opening portion 14 .

The opening portion 14 is the engaging portion, which is provided at one end of the housing 11, as shown in FIG. 2 . That is, a hollow portion 14A is formed inside the opening portion 14, into which the engaging portion 23C of the cable side connector 20 and the terminal 22 provided inside the engaging portion 23C are inserted.

In the central portion of the hollow portion 14A, a flat plate-shaped terminal holder 15 protrudes toward the opening portion 14 .

Each terminal 12 is installed in such a manner that a part thereof is embedded in the upper surface and the lower surface of the terminal holder 15 . That is to say, each terminal 12 is arranged on the top and the bottom of the terminal support 15, and there is a distance between adjacent terminals according to the width direction of the substrate edge connector 10 (as shown by arrow A in FIG. 2 ). mode configuration.

There is a displacement amount of half a pitch between each terminal 12 arranged on the top surface and the bottom surface of the terminal holder 15 . With this arrangement, the tails 12a are arranged in a single row at high density, thereby providing the desired substrate-mounted connector which does not occupy surface-mounted area on the substrate. (For ease of illustrating embodiments of the present invention, top terminal 12 and bottom terminal 22 are shown in the same longitudinal sectional view of FIGS. 1 and 8 ).

Of these terminals 12, although it depends on the use of the terminals and the number of electrodes in the transmission path, usually, the ground terminal and the signal terminal forming the high-frequency signal transmission path are arranged adjacent to each other in use.

As shown in FIG. 1 , the metal shell 23 of the cable side connector 20 is inserted into the metal shell 13 of the substrate side connector 10 , so that the metal shells 13 , 23 are electrically connected to the terminals 12 , 22 respectively.

As shown in FIG. 8 , the cable side connector 20 has its front part terminal 22 comprising a spring element, whereby the housing 21 is surrounded by a metal shell 23 .

The obvious feature of the connector of the present embodiment is that the groove portion 16 in the metal shell 13 of the substrate edge connector 10 is provided in multiples for adjusting the distance between the metal shell 13 of the substrate edge connector 10 and the terminal 12. spacing.

The reason for providing the groove portions 16 is to attempt to match impedance by the action of these groove portions 16 . Here, a plurality of groove portions 16 are formed by punching the metal casing 13 . At the time of punching, the depth of the groove portion 16 is easily adjusted. Therefore, the impedance can be easily adjusted with these groove portions 16 . The reason for this is that the impedance of the board-side connector 10 can be greatly changed by the distance between the metal shell 13 and the terminal 12 .

With the embodiment shown in Figure 1, the spacing between the terminal 12 and the groove portion 16 in the substrate side connector 10 is set to be substantially equal to the part where the cable side connector 20 is inserted, and its metal shell 23 is located in the metal shell 13 on the inner surface. That is to say, as shown in Figure 1, the inner surface (the inner surface is just positioned under the groove part 16) 16a of the groove part 16 of the corresponding metal shell 13 and the inner surface 23a of the metal shell 23 of the cable side connector 20 are basically set on the same plane.

As a result, the respective spacings between the terminal 12 and the metal housings 13, 23 become substantially equal to each other through the total length of the board side connector 10 and the cable side connector 20, thereby matching the impedances of the portions to each other.

As shown in FIG. 2, the groove portion 16 of the metal housing 13 of the board side connector 10 is provided in plural. Of course, a single large groove portion may also be provided as the groove portion 16 . However, in the case of forming the groove portions by, for example, punching, since the punching method is simple and easily secures the mechanical strength of the metal case 13, it is advantageous to form a plurality of groove portions. Also, in the case of providing a plurality of terminals, it is possible to provide a plurality of groove portions corresponding to the respective terminals with high precision.

The terminals 12 of the board-side connector 10 are provided in plural, and a pitch is provided between adjacent terminals in the width direction of the board-side connector 10 . Arranging these terminals 12 in the width direction of the board-side connector 10 not only achieves high density, but also makes it easy for each terminal to correspond to each groove portion 16 .

In the present embodiment, each groove portion 16 is formed as a flat plate rectangle, and four groove portions are provided in such a way that there is a distance between adjacent terminals in the width direction of the substrate side connector 10, therefore, high density can be achieved without difficulty. Each groove portion 16 associated with the metal case 13 is arranged in a high degree.

The second embodiment will be described below based on FIG. 7 . In the first embodiment described above, the respective groove portions 16 are provided in the upper surface 13f of the metal case 13, however, in the second embodiment, the groove portions 16 are provided in the upper surface 13f and the lower surface 13b. This configuration prevents signal degradation in the more preferred mode according to the configuration of the differential signal.

Throughout the two embodiments described above, the groove portion 16 is provided adjacent to the opening portion 14 into which the cable edge connector 20 is to be inserted and engaged. With this structure, it is possible to avoid a negative influence on the area C of the mating portion of the connector due to the presence of the groove portion 16 . That is, the groove portion 16 protrudes from the inner surface 13a of the metal case 13, however, away from the region C of the mating portion of the connector. Therefore, an excellent structure of high-density small and thin connectors can be obtained.

As shown in FIG. 1, the front end of the metal housing 23 of the cable side connector 20 may be formed using the protruding bottom of the groove portion 16 as a stop point for contact with the engaging portion 23c. The engagement position of the two connectors can thus be defined.

In order to ensure the electrical connection between the metal shells 13 and 23 , an engaging piece 18 is provided on the metal shell 13 of the substrate-side connector 10 for engaging the metal shell 23 of the cable-side connector 20 . The engaging piece 18 not only ensures the electrical connection between the metal shells 13, 23, but also has a locking function.

The locking function is accomplished by the protruding portion 18a provided in the engaging piece 18 and the engaging hole 23b provided in the metal shell 23 of the cable side connector 20 capable of engaging with the protruding portion 18a. Multiple locking functions can be set as desired.

The high-speed transmission connector of the present invention can adjust the characteristic impedance by a simple method, and can make the connector have higher density and sufficient miniaturization. In particular, since the groove portion is provided to adjust the distance between the terminal and the metal case in a connector, the function of the groove portion can be used for impedance matching. That is, without providing the recessed portion as a separate member, it is easy to form the required size by punching the metal case. In addition, it is easy to adjust the depth of the groove portion. Also, it is easy to adjust the impedance with the groove portion.

It is to be understood that the present invention may be embodied in other specific forms without departing from the spirit or main characteristics of the invention. Accordingly, the present examples and embodiments should be considered in all respects as illustrative rather than restrictive, and the invention should not be limited to the detailed description given.

Claims (9)

1. A high-speed transmission connector, comprising: a pair of interconnected connectors (10, 20), each connector (10, 20) comprising: a housing (11, 21), and a covering housing (11, 21) metal housing (13, 23), and terminals (12, 22) arranged in the housing (11, 21), wherein the metal housing (13) of one connector (10) is inserted into the other connector (20) In the metal casing (23), the metal casing (13, 23) and the terminals (12, 22) are electrically connected respectively; it is characterized in that: A groove portion (16) is provided on a metal shell (13) of a connector (10) for adjusting the distance between a terminal (12) in the connector (10) and the metal shell (13). 2. The high-speed transmission connector according to claim 1, characterized in that the distance between the terminal (12) in the connector (10) and the groove portion (16) is set to be substantially equal to that of the other connector ( 20) the distance between the terminal (22) and the metal casing (23). 3. The high-speed transmission connector according to claim 1 or 2, wherein the groove portion is provided in plural. 4. The high-speed transmission connector according to claim 1, characterized in that the terminals (12) in the connector (10) are arranged in multiples, between adjacent terminals in the width direction of the connector (10) With spacing. 5. The high-speed transmission connector according to claim 3 or 4, characterized in that a distance is provided between each groove portion (16) and the adjacent groove portion in the width direction of the connector (10) . 6. The high-speed transmission connector according to any one of claims 1 to 5, characterized in that each groove portion is set in the flat plate portion (13b, 13f) of the metal shell (13), and is adjacent to the Insert the mating part (14) of the other connector (20). 7. A high-speed transmission connector according to any one of claims 1 to 6, characterized in that recessed portions (16) are provided near the terminals (12) for transmitting differential signals. 8. The high-speed transmission connector according to any one of claims 1 to 7, characterized in that the groove portion is used as a stop point, and when another connector (20) is inserted, the end of the metal shell (23) ( 23c) Contact with the inner surface of a connector (10) at the stopping point. 9. The high-speed transmission connector according to claim 1, characterized in that at least one of the metal shell (13) of the connector (10) and the metal shell (23) of another connector (20) is provided with an engaging means (18, 23b) for connection.

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